K-3D

Free plan LinuxMacWindows

What K-3D is

K-3D is free software for 3D modeling and animation, with downloads listed for macOS and Windows as well as source code. It supports procedural and parametric workflows, letting users change properties and see results interactively. Its node-based visualization pipeline connects components and passes selections between modifiers. An undo tree supports undoing and redoing changes. The site describes native RenderMan support within the K-3D interface, plus real-time mirroring of one side of a model and welding the result into a subdivision surface. The source code is available under the GNU General Public License. Development information lists GNU/Linux, MacOS X, FreeBSD, Microsoft Windows, and other build platforms. Optional build integrations include Collada, DBus, GLX, Gnome VFS, GTS, ImageMagick, ODE, OpenCASCADE, and OpenEXR. K-3D describes itself as a tool for new artists and professionals. Documentation is available through an archived wiki, while support options include forums, a development mailing list, and issue submission.

Who it suits

K-3D suits artists, from newcomers to professionals, who want free desktop 3D modeling and animation software. Its procedural and parametric workflows may also suit users who want interactive property changes and a node-based pipeline.

What it does well

Free software under the GNU General Public License.
Supports procedural and parametric workflows.
Includes a node-based visualization pipeline and undo tree.
Downloads include macOS, Windows, and source code.

What to know first

Documentation is available through an archived wiki.
RenderMan support is described as native, but the render engine is external.

Plans

Plan	Billed and limits	Price
K-3D	Free software; no paid tiers or usage limits stated	Free

As k-3d.org lists them, read 9 Oct 2026. The maker's own page has the final word.

Getting started

Visit the K-3D website.
Choose a MacOS or Windows download, or obtain the source code.
Use the archived wiki for documentation.
Seek help through the forums, development mailing list, or issue submission.

Verdict

K-3D offers free modeling and animation tools with procedural workflows and an undo tree. Its documentation is archived, so users may want to check the available forums, mailing list, or issue submission for help.

Questions

Is K-3D free?

Yes. K-3D is free software, and no paid tiers or usage limits are stated.

Which platforms are supported?

The download page lists MacOS and Windows, plus source code. Development information lists GNU/Linux, MacOS X, FreeBSD, Microsoft Windows, and other build platforms.

Is K-3D open source?

Its source code is available under the GNU General Public License.

Does it support animation and parametric modeling?

Yes. K-3D is 3D modeling and animation software, and parametric modeling is listed.

What rendering support does it offer?

The site describes native RenderMan support integrated with the K-3D interface.

Where can users get documentation or help?

Documentation is available through an archived wiki. Help options include forums, a development mailing list, and issue submission.

Facts from K-3D's own pages

Animation tools: Yes · k-3d.org, 20 Sept 2026
Audience: The site describes K-3D as a tool for artists, including new artists and professionals. · k-3d.org, 9 Oct 2026
Build platforms: The development page says K-3D can be built on GNU/Linux, MacOS X, FreeBSD, Microsoft Windows, and other platforms. · k-3d.org, 9 Oct 2026
Documentation: Documentation is available through an archived wiki. · k-3d.org, 9 Oct 2026
Downloads: The download page lists MacOS, Windows, and source code. · k-3d.org, 9 Oct 2026
Free plan: Yes · k-3d.org, 20 Sept 2026
License: The source code is available under the GNU General Public License. · k-3d.org, 9 Oct 2026
Modeling: The site describes mirroring one side of a model and welding the result into a subdivision surface in real time. · k-3d.org, 9 Oct 2026
Optional integrations: Optional build integrations listed include Collada, DBus, GLX, Gnome VFS, GTS, ImageMagick, ODE, OpenCASCADE, and OpenEXR. · k-3d.org, 9 Oct 2026
Parametric modeling: Yes · k-3d.org, 20 Sept 2026
Pipeline: Its node-based visualization pipeline lets users connect components and pass selections between modifiers. · k-3d.org, 9 Oct 2026
Platform access: desktop · k-3d.org, 20 Sept 2026
Product: K-3D is free software for 3D modeling and animation. · k-3d.org, 9 Oct 2026
Render engine: external · k-3d.org, 20 Sept 2026
Rendering: The site describes native RenderMan support integrated with the K-3D interface. · k-3d.org, 9 Oct 2026
Support: The site points users to forums, a development mailing list, or issue submission for help. · k-3d.org, 9 Oct 2026
Undo: It includes an undo/redo system with an undo tree. · k-3d.org, 9 Oct 2026
Workflow: It supports procedural and parametric workflows, with interactive property changes and immediate results. · k-3d.org, 9 Oct 2026